How to update a WordPress theme?

You can always get the latest version of the theme on the downloads page of your ThemeForest account. For the update purpose you can just download “Installable WordPress file only”, this file containing only parent theme files, without demo data, documentation and child theme.

You will not loose your content by updating with any of the following options:

Via Appearance > Themes in WP dashboard – by deleting the parent theme and uploading a new version instead. Note that first you also need to deactivate a child theme (parent theme can’t be removed while child is active) – just activate any other theme for that moment.